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		<title>Events</title>

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		<tone-example label="Events">
			<div slot="explanation">
				Tone's Event classes (<a
					href="https://tonejs.github.io/docs/latest/classes/ToneEvent"
					>Tone.ToneEvent</a
				>,
				<a href="https://tonejs.github.io/docs/latest/classes/Loop"
					>Tone.Loop</a
				>,
				<a href="https://tonejs.github.io/docs/latest/classes/Part"
					>Tone.Part</a
				>
				and
				<a href="https://tonejs.github.io/docs/latest/classes/Sequence"
					>Tone.Sequence</a
				>) simplify scheduling events along the Transport. Each class
				abstracts away calls to
				<a
					href="https://tonejs.github.io/docs/latest/classes/Transport.schedule"
					>Transport.schedule</a
				>
				or
				<a
					href="https://tonejs.github.io/docs/latest/classes/Transport.scheduleRepeat"
					>scheduleRepeat</a
				>
				and lets you create precise, rhythmic events which are
				startable, stoppable and loopable. (note that ToneEvent was
				called
				<a href="https://tonejs.github.io/docs/latest/classes/Event"
					>Event</a
				>
				before Tone.js 14.x)
			</div>

			<div id="content">
				<tone-play-toggle></tone-play-toggle>
			</div>
		</tone-example>

		<script type="text/javascript">
			/**
			 * KICK
			 */
			const kick = new Tone.MembraneSynth({
				envelope: {
					sustain: 0,
					attack: 0.02,
					decay: 0.8,
				},
				octaves: 10,
				pitchDecay: 0.01,
			}).toDestination();

			const kickPart = new Tone.Loop((time) => {
				kick.triggerAttackRelease("C2", "8n", time);
			}, "2n").start(0);

			/**
			 * SNARE
			 */
			const snare = new Tone.NoiseSynth({
				volume: -10,
				envelope: {
					attack: 0.001,
					decay: 0.2,
					sustain: 0,
				},
			}).toDestination();

			const snarePart = new Tone.Loop((time) => {
				snare.triggerAttack(time);
			}, "2n").start("4n");

			/**
			 * PIANO
			 */
			const keys = new Tone.PolySynth(Tone.Synth, {
				volume: -8,
				oscillator: {
					partials: [1, 2, 1],
				},
			}).toDestination();

			const cChord = ["C4", "E4", "G4", "B4"];
			const dChord = ["D4", "F4", "A4", "C5"];
			const gChord = ["B3", "D4", "E4", "A4"];

			const pianoPart = new Tone.Part(
				(time, chord) => {
					keys.triggerAttackRelease(chord, "8n", time);
				},
				[
					["0:0:2", cChord],
					["0:1", cChord],
					["0:1:3", dChord],
					["0:2:2", cChord],
					["0:3", cChord],
					["0:3:2", gChord],
				]
			).start("2m");

			pianoPart.loop = true;
			pianoPart.loopEnd = "1m";
			pianoPart.humanize = true;

			/**
			 * BASS
			 */
			const bass = new Tone.MonoSynth({
				volume: -10,
				envelope: {
					attack: 0.1,
					decay: 0.3,
					release: 2,
				},
				filterEnvelope: {
					attack: 0.001,
					decay: 0.01,
					sustain: 0.5,
					baseFrequency: 200,
					octaves: 2.6,
				},
			}).toDestination();

			const bassPart = new Tone.Sequence(
				(time, note) => {
					bass.triggerAttackRelease(note, "16n", time);
				},
				["C2", ["C3", ["C3", "D2"]], "E2", ["D2", "A1"]],
				"4n"
			).start(0);

			bassPart.probability = 0.9;

			// set the transport
			Tone.Transport.bpm.value = 90;

			drawer()
				.add({
					name: "Kick",
					tone: kick,
					open: false,
				})
				.add({
					name: "Snare",
					tone: snare,
					open: false,
				})
				.add({
					name: "Bass",
					tone: bass,
					open: false,
				})
				.add({
					name: "Keys",
					tone: keys,
					open: false,
				});

			// bind the interface
			document
				.querySelector("tone-play-toggle")
				.addEventListener("start", (e) => Tone.Transport.start());
			document
				.querySelector("tone-play-toggle")
				.addEventListener("stop", (e) => Tone.Transport.stop());
		</script>
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